Panasonic NN-L750WB Service Manual page 49

2. A continuity check across the magnetron filament terminals
should indicate one ohm or less
3. A continuity check between each filament terminal and the
magnetron case should read open.
10.4. Push Button Keyboard
Check the continuity between the switch terminals, by tapping an appropriate pad on the
keyboard. The keypad matrix is shown on
10.5. Inverter Power Supply
Caution
DO NOT try to repair this inverter power supply). Replace as a
whole H.V. Inverter Unit.
10.6. Inverter Power Supply Unit
Warning
Key Board
Inverter Power Supply Diagram
Figure 3
49
Matrix.